A 59-year-old man with type 2 diabetes for 12 years has persistent albuminuria (urine albumin-to-creatinine ratio 15 mg/mmol) and eGFR 65 mL/min/1.73 m². Blood pressure is 138/82 mm Hg on amlodipine 10 mg daily. Which change best aligns with Canadian recommendations to slow diabetic nephropathy progression?